540
FNCA52 TJSJ 240730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST WED JUN 24 2026
DISCUSSION
A TROPICAL WAVE WILL MOVE SOUTH OF THE REGION TODAY, WITH ITS
MOISTURE FIELD REACHING THE AREA AND PROVIDING SOME RELIEF IN
TERMS OF RH VALUES. NEVERTHELESS, OVER SOUTHERN OF PR, RELATIVE
HUMIDITIES IN THE LOW 50S CONTINUE TO BE POSSIBLE. WINDS WILL BE
FROM THE EAST- SOUTHEAST AT 10 TO 20 MPH, WITH GUSTS UP TO
33 MPH, ESPECIALLY FROM MID MORNING INTO THE AFTERNOON. ALTHOUGH
A MODERATE FIRE DANGER RISK IS FORECAST, A FIRE DANGER STATEMENT
COULD BE ISSUED LATER TODAY IF THE MOISTURE FIELD FROM THE
TROPICAL WAVE MOVES FURTHER SOUTH, GIVING WAY TO A HIGH FIRE
DANGER RISK. AN ELEVATED HEAT RISK WILL ALSO PERSIST OVER THE
AREA AND SAHARAN DUST CONCENTRATIONS WILL GRADUALLY INCREASE AS
THE DAY CONTINUES.
PRZ014-242000-
SOUTHEAST COASTAL PLAINS-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 90 (0) 75 (-1) 90
RH % (24H TREND) 49 (+2) 85 (+1) 48
WIND 20FT/EARLY(MPH) E 17 E 14 E 18
WIND 20FT/LATE(MPH) E 18 E 13 E 18
MIXING HGT(FT-AGL/MSL)5300 4810
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 95400 91390
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-242000-
SOUTHERN HILLS-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 88 (+3) 71 (-2) 88
RH % (24H TREND) 60 (-2) 95 (+5) 58
WIND 20FT/EARLY(MPH) E 13 E 13 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 14
MIXING HGT(FT-AGL/MSL)5650 5200
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 90400 93600
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-242000-
NORTH COASTAL PLAINS-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 30
TEMP (24H TREND) 89 (+1) 75 (-1) 91
RH % (24H TREND) 62 (-3) 94 (+2) 59
WIND 20FT/EARLY(MPH) E 16 E 19 E 17
WIND 20FT/LATE(MPH) E 21 E 12 E 23
MIXING HGT(FT-AGL/MSL)5180 5570
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 88060 100260
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-242000-
NORTHERN HILLS-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30
TEMP (24H TREND) 89 (+2) 72 (-1) 90
RH % (24H TREND) 62 (-2) 96 (+1) 59
WIND 20FT/EARLY(MPH) E 13 E 17 E 16
WIND 20FT/LATE(MPH) E 19 E 9 E 20
MIXING HGT(FT-AGL/MSL)6360 6520
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 82680 97800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-242000-
WEST COAST-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 40
TEMP (24H TREND) 92 (+1) 74 (0) 92
RH % (24H TREND) 59 (-3) 95 (+4) 58
WIND 20FT/EARLY(MPH) E 13 E 13 E 16
WIND 20FT/LATE(MPH) E 14 E 12 E 17
MIXING HGT(FT-AGL/MSL)4900 4660
TRANSPORT WND (MPH) E 12 E 14
VENT RATE (KT-FT) 49000 55920
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-242000-
EASTERN INTERIOR-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 30
TEMP (24H TREND) 88 (+2) 73 (-2) 89
RH % (24H TREND) 63 (0) 96 (+4) 60
WIND 20FT/EARLY(MPH) E 13 E 13 E 16
WIND 20FT/LATE(MPH) E 14 E 14 E 16
MIXING HGT(FT-AGL/MSL)6040 5390
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 102680 97020
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-242000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 60 30
TEMP (24H TREND) 84 (+4) 71 (-2) 85
RH % (24H TREND) 69 (-3) 99 (+5) 67
WIND 20FT/EARLY(MPH) E 12 E 11 E 14
WIND 20FT/LATE(MPH) E 12 E 12 E 14
MIXING HGT(FT-AGL/MSL)5080 4650
TRANSPORT WND (MPH) E 21 E 23
VENT RATE (KT-FT) 91440 93000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-242000-
CENTRAL MOUNTAIN RANGE-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 87 (+4) 69 (-2) 89
RH % (24H TREND) 63 (-5) 97 (+3) 59
WIND 20FT/EARLY(MPH) E 10 E 10 E 11
WIND 20FT/LATE(MPH) E 11 E 8 E 12
MIXING HGT(FT-AGL/MSL)7540 7120
TRANSPORT WND (MPH) E 13 SE 15
VENT RATE (KT-FT) 82940 92560
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-242000-
CAYEY MOUNTAIN RANGE-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 20
TEMP (24H TREND) 83 (+1) 71 (-2) 84
RH % (24H TREND) 69 (+3) 98 (+1) 66
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 12 E 13
MIXING HGT(FT-AGL/MSL)5380 4800
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 96840 91200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-242000-
VIEQUES-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 20
TEMP (24H TREND) 89 (+2) 77 (-2) 89
RH % (24H TREND) 60 (-3) 89 (+6) 59
WIND 20FT/EARLY(MPH) E 17 E 18 E 18
WIND 20FT/LATE(MPH) E 16 E 18 E 17
MIXING HGT(FT-AGL/MSL)3070 4170
TRANSPORT WND (MPH) E 22 E 26
VENT RATE (KT-FT) 58330 95910
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-242000-
CULEBRA-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20
TEMP (24H TREND) 90 (+2) 77 (-3) 90
RH % (24H TREND) 62 (-3) 92 (+7) 60
WIND 20FT/EARLY(MPH) E 17 E 17 E 18
WIND 20FT/LATE(MPH) E 16 E 19 E 17
MIXING HGT(FT-AGL/MSL)2860 4070
TRANSPORT WND (MPH) E 22 E 24
VENT RATE (KT-FT) 54340 85470
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-242000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 92 (+1) 75 (-1) 91
RH % (24H TREND) 50 (-2) 85 (+1) 46
WIND 20FT/EARLY(MPH) E 19 E 18 E 23
WIND 20FT/LATE(MPH) SE 20 E 14 SE 24
MIXING HGT(FT-AGL/MSL)5050 4860
TRANSPORT WND (MPH) E 21 E 25
VENT RATE (KT-FT) 90900 106920
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-242000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 89 (+4) 77 (-2) 89
RH % (24H TREND) 62 (-6) 92 (+7) 61
WIND 20FT/EARLY(MPH) E 17 E 17 E 18
WIND 20FT/LATE(MPH) E 17 E 19 E 18
MIXING HGT(FT-AGL/MSL)2700 3760
TRANSPORT WND (MPH) E 23 E 26
VENT RATE (KT-FT) 54000 86480
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-242000-
ST CROIX-
330 AM AST WED JUN 24 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 10
TEMP (24H TREND) 89 (+3) 79 (+1) 89
RH % (24H TREND) 63 (-4) 87 (-1) 61
WIND 20FT/EARLY(MPH) E 17 E 18 E 19
WIND 20FT/LATE(MPH) E 17 E 19 E 17
MIXING HGT(FT-AGL/MSL)5280 4350
TRANSPORT WND (MPH) E 25 E 24
VENT RATE (KT-FT) 116160 91350
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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